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안정화 열처리에 의한 Al-4.8Zn-1.3Mg계 합금 압출재 특성 평가

원문정보

Characterization of Extrusion Parts for after Pre-aging Treatment in an Al-4.8Zn-1.3Mg Alloy

이창연

피인용수 : 0(자료제공 : 네이버학술정보)

초록

영어

In this study, the effect of pre-aging treatment for inhibition of natural aging of Al-4.8Zn-1.3Mg alloy by extrusion process was investigated. Firstly, the as-cast microstructure of Al-4.8Zn-1.3Mg alloy billet and its evolution during homogenization(460℃, 4h + 510℃, 5h) were investigated by means of optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), hardness analysis. The as-cast microstructures of Al-4.8Zn-1.3Mg alloy reveal Mg2Zn, Al5Cu, Al3Cu formed between dendrities. After homogenization, MgZn, Al4Cu, Al13Cu phases precipitated into the matrix. In addition, standard deviation of homogenized billet was improved than as-cast billet from 2.62 to 0.99. According to pre-aging(100℃, 1h) Al-4.8Zn-1.3Mg alloy by extrusion process, yield strength and tensile strength deviation improved more than condition by natural aging.

목차

ABSTRACT
1. 서론
2. 실험내용 및 방법
2.1 균질화 열처리
2.2 안정화 열처리
3. 실험결과 및 고찰
3.1 주조재 미세조직 특성
3.2 균질재 미세조직 특성
3.3 균질 열처리 후 경도 산포
3.4 안정화 열처리 후 기계적 특성 평가
4. 결론
후기
References

저자정보

  • 이창연 Chang-Yeon Lee. Member, Assistant Manager, DaejooKores Company

참고문헌

자료제공 : 네이버학술정보

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